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(No Model.) 2 SlieetsSheet 1. H. G. VOIGHT.

LOCK.

No. 574,506. Patented Jan. 5, 1897.

Hid/755555 4% var/far ETERS co. PHOT0-LIT UNITED STATES PATENT OFFICE.

HENRY G. VOIGHT, OF NElV BRITAIN, CONNECTICUT, ASSIGNOR TO THE RUSSELL &ERVIN MANUFACTURING COMPANY, OF SAME PLACE.

LOZCK,

SPECIFICATION forming part of Letters Patent N 0. 574,506, dated January5, 1897. Application filed October 15, 1896; Serial No. 608,935. (Nomodel.)

To all whom it may concern.-

Be it known that I, HENRY G. Vorenr, a citizen of the United States,residing at New Britain, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements in Locks,of which the following is a specification. Y a

My invention relates to improvementsin locks of the class known asnight-latches or combined latch and lock, and the objects of myimprovement are simplicity and economy in construction and efficiencyand security in use.

In the accompanying drawings, Figure l is a front elevation of my lockwith the capplate removed. Fig. 2 is a corresponding view with some ofthe parts in a different position. Fig. 3 is a face view of thestrikerplate or keeper. Fig. 4 is an enlarged vertical section on theline a a: of Fig. 2 with some of the parts in elevation. Fig. 5 is anenlarged horizontal section on the line 3 y of Fig. 2. Fig. 6 is adetached front elevation with the latch-throwing lever removed, saidfigure being on the same scale as Fig. 1. Fig. 7 is a detached sectionalView on the line a; at of Fig. 2, the cylinder-lock being removed. Fig.8 is a detached front elevation of the false latch bolt or slide, andFig. 9 is a plan view of the same.

The main portion of the latch-bolt A, the latch-bolt cam 10, the dividedhub 11, the lever 12 for operating the latch-bolt through said hub, thestop 13 for the outer part of said divided hub, and the stop-operatingdevices are of an ordinary construction. An ordinary cylinder-lock issecured through its case B to the latch-case C by means of the bolt orscrew 14 in the ordinary manner. The rotary cylinder 15 of this lock isprovided with the usual tumblers and the ordinary wing 16. A stop 17 onthe case C limits the rotation of this wing in one direction. A lever 18is pivoted to a post 19 on the case with one end in position to beoperated upon by the wing 16, its opposite end being connected to thelatch-bolt by a pin-and-slot connection, while said lever and thelatch-bolt are held in their normal position by means of the spring 20.

The present invention relates to the locking-dog 21 for holding thelatch-bolt inits extended position and to the parts that cooperate withsaid dog. The latch-bolt is pro vided with a shoulder 22, back of whichthe holding-arm 23 of the dog 21 passes to lock thelatchbolt from beingpushed inwardly. This dog is pivoted on the post 24 and is arranged tonormally rest in the position shown in Fig. 2 (preferably by means ofthe weighted end 25) with its holding-arm 23 back of the shoulder 22 ofthe latch-bolt. Below the latch-bolt A is a false latch bolt or slide26, which is pressed outwardly by means of the spring 27 and inwardly bymeans of the striker-plate 28, which has no keeper-mortise for saidfalse latch-bolt to enter, so that whenever the door is closed thisfalse latchbolt is forced inwardly and held in by the striker-plate. Itis provided with an incline or cam 29, that engages a lateral pin orprojection 30 (indicated by broken lines in Figs. 1 and 2) for forcingthe holding-arm 23 downwardly out of en gagement with the shoulder 22 ofthe latch-bolt Whenever the door is opened, so as to permit the spring27 to force the said false latch-bolt outwardly into the position shownin Fig. 1. \Vhenever this false latchbolt is held within the case in theposition shown in Fig. 2, the incline or cam is withdrawn, so as topermit the locking-dog to act through gravity and move the holding-arm23 behind the shoulder 22 and secure the latchbolt against being pushedinwardly. At the same time the locking-dog is so connected with thelatch-operating levers that it is withdrawn from behind the shoulder ofthe latch-bolt whenever said bolt is operated through the cylinder-lockor through the knob-spindle. The upper end 31 of the lever 12, when inits normal position, lies by the side of a shoulder 32 in the under sideof the weighted end 25 of the dog 21, whereby the movement of said leveracts to raise the said weighted end, thereby withdrawing thelatch-holding arm 23 of the dog 21 from behind the shoulder 22 of thelatch-bolt. The under side of the said weighted end, to the right of theshoulder 32, as seen in Figs. 1 and 2, is curved, as at 33, on an arccorresponding to that described by said upper end 31 of the lever 12,whereby after passing said shoulder 32 the holding-arm ICO of the dog isheld out of engagement with the shoulder 22 of the latch-bolt until thelever 12 is again in its normal position.

A swinging arm 31 is pivoted to the weighted end of the (log 21. by thepin One edge of this arm 3% faces the wing 16 of the cylinder-lock, andis provided with a shoulder 36 and curved face 37 concentric with theaxis of said wing. At the opposite edge there is a proj ection 38, whichrests against the post 19, as shown in Fig. 6. \Vhenever the wing 16 ofthe cylinder-lock is turned for operatin g the latch through the leverlS the said wing first engages the shoulder 36, so as to raise saidswinging arm and weighted end of the dog until the projection 38 canslide over the top of the post 19 and permit said arm to swing away fromthe wing 16 sufficiently to let said wing pass the shoulder 36 and moveover the curved face 37, whereby the holding-arm 23 of the dog 21 iswithdrawn from behind the shoulder of the latch-bolt and held out ofengagement iherewith until the wing 16 is turned back to the positionshown in the drawings.

I claim as my invention- 1. The combination of a cylinder-lock havingthe wing 16, a latch-bolt, the lever 18 connecting said wing andlatch-bolt, the latchhub 11, lever 12 connecting said hub andlatch-bolt, the false latch-bolt having the incline or cam 29, the latchlocking-dog pivoted on the case in engagement with said false latch-boltand lever 2, and the pivoted swinging arm on said dog for being engagedby the wing 16 of said cylinder-lock, substantially as described.

2. In a lock the combination of the latchbolt having a shoulder 22, thelatch-hub 11, the lever 12 acted upon by said hub, the locking-dog 21pivoted at 24C and having the holding-arm 23, pin shoulder 32 and curvedface 33, the end of the lever 12 being adapted for acting on saidshoulder and curved face, and the spring-pressed false latch-bolt havingthe incline or cam 29 for engagement with the pin 30 of the locking-dog,substantially as described.

3. In a lock, the combination of the latchbolt and its operating deviceswith the locking-dog pivoted on the case, the swinging arm pivoted tothe weighted end of said dog and having the projection 38 shoulder 36and curved edge 37, and the wing 16 of a lock for engaging the saidswinging arm, substautially as described.

HFNRY G. VOIGIIT.

\Vitnesses:

T. S. BISHOP, M. WIARD.

